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Consumption of diacylglycerol oil as part of a reduced-energy diet enhances loss of body weight and fat in comparison with consumption of a triacylglycerol control oil^1,2,3

¹ From the Chicago Center for Clinical Research, Chicago (KCM, MHD, DMU, MRD, KAI, BDA, SDF, and MB); the Kao Corporation, Biological Science Laboratories, Tochigi, Japan (RT, NM, and IT); and the Rush University College of Medicine, Chicago (GSF).

Background: Diacylglycerol is a natural component of edible oils that has metabolic characteristics that are distinct from those of triacylglycerol.

Objective: We assessed the efficacy of an oil containing mainly 1,3-diacylglycerol in reducing body weight and fat mass when incorporated into a reduced-energy diet.

Design: The study was a randomized, double-blind, parallel intervention trial that was conducted at an outpatient clinical research center. The subjects (n = 131) were overweight or obese men (waist circumference 90 cm) and women (waist circumference 87 cm). Food products (muffins, crackers, soup, cookies, and granola bars) containing diacylglycerol or triacylglycerol oil and having the same fatty acid composition were incorporated into a reduced-energy diet (2100–3350-kJ/d deficit) for 24 wk. Percentages of change in body weight, fat mass, and intraabdominal fat area were assessed.

Results: In an intention-to-treat analysis, body weight and fat mass decreased significantly more in the diacylglycerol group than in the triacylglycerol group (P = 0.025 and 0.037, respectively). By the end of the trial, mean body weight had decreased 3.6% and 2.5% in the diacylglycerol and triacylglycerol groups, respectively. Fat mass decreased 8.3% and 5.6% in the diacylglycerol and triacylglycerol groups, respectively.

Conclusion: Foods containing diacylglycerol oil promoted weight loss and body fat reduction and may be useful as an adjunct to diet therapy in the management of obesity.

Key Words: Diacylglycerol • body weight • body composition • visceral fat • intraabdominal fat • fat mass • triacylglycerol • obesity • overweight

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